A novel technique to specifically separate RNAs by Schizophyllan

Area of Science:

• Biochemistry
• Materials Science
• Molecular Biology

Background:

• Schizophyllan (SPG) is a beta-1,3-glucan with a unique glucose side chain structure.
• SPG exhibits the ability to form complexes with single-stranded polynucleotides.
• These complexes are stabilized by hydrogen bonding and hydrophobic interactions.

Purpose of the Study:

• To investigate the potential of SPG as a material for RNA separation.
• To develop an affinity column utilizing SPG for polynucleotide purification.
• To demonstrate the selective retention and release of RNA molecules.

Main Methods:

• Preparation of single-stranded SPG appended gel supports.
• Utilizing the SPG-appended gel as an affinity column for polynucleotides.
• Testing the column's performance with various single-stranded RNAs (poly(C), poly(A), poly(G)).
• Optimizing elution conditions for mild RNA recovery.

Main Results:

• The SPG affinity column selectively retained poly(C) and poly(A) at low temperatures.
• Poly(G) did not interact with the SPG column, passing through without retention.
• Trapped RNAs were successfully released under mild elution conditions.
• The SPG column demonstrated utility for separating mRNA based on its poly(A) tail.

Conclusions:

• SPG can function as an effective RNA separation material.
• SPG's RNA binding capability is independent of cation charge or nucleic bases.
• The developed SPG affinity column offers a novel method for RNA purification.